Colors credit provided by Anthony Tollin.
Blurb: "The Return of Aquaman!"
The woman on the cover was previously identified as Gwendolyn Sterling. It is unlikely it was intended to be her since the cover appears to be based on two panels in the book (page 8 with a red-haired hostage (light red not auburn brown like Gwen's) in a purple dress and page 12 with The Spectre appearing out of a flame).
The character of Jerry Grandenetti is presumably named in homage to the artist of the same name who worked on the previous Spectre series. (Note from Fred Snyder via the GCD Error Tracker.)
Letters of comment from readers Arlen L. Schumer, Sam Hopkins, Raymond Johnson and Brian Schuck.
Aquaman stories resume as backups after previous cancellation of Aquaman (DC, 1962 series) #56 (April 1971).